WO2003070836A3 - A fluorescent lamp brightness control process by ballast frequency adjustment - Google Patents
A fluorescent lamp brightness control process by ballast frequency adjustment Download PDFInfo
- Publication number
- WO2003070836A3 WO2003070836A3 PCT/US2003/004775 US0304775W WO03070836A3 WO 2003070836 A3 WO2003070836 A3 WO 2003070836A3 US 0304775 W US0304775 W US 0304775W WO 03070836 A3 WO03070836 A3 WO 03070836A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signal
- drive
- ballast
- brightness
- lamp load
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/39—Controlling the intensity of light continuously
- H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
Abstract
A fluorescent ballast and control circuit having a drive signal generator responsive to a drive frequency control signal, the drive signal generator providing a ballast drive signal having a drive signal frequency proportional to the drive frequency control signal. A fluorescent ballast is driven by the ballast drive signal and has an output voltage coupled to drive a fluorescent lamp load. The fluorescent ballast circuit provides a change in the output voltage applied to the lamp load in response to a change in the ballast drive signal frequency. A means for monitoring the brightness of the lamp load develops a brightness signal that characterizes the brightness of the lamp load. A signal conditioner responds to the brightness signal and to a reference signal and provides and adjusts a drive frequency control signal to keep the brightness signal substantially constant.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03709144A EP1477047A2 (en) | 2002-02-20 | 2003-02-18 | A fluorescent lamp brightness control process by ballast frequency adjustment |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/079,182 | 2002-02-20 | ||
US10/079,182 US6667585B2 (en) | 2002-02-20 | 2002-02-20 | Fluorescent lamp brightness control process by ballast frequency adjustment |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2003070836A2 WO2003070836A2 (en) | 2003-08-28 |
WO2003070836A3 true WO2003070836A3 (en) | 2004-04-01 |
Family
ID=27732989
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2003/004775 WO2003070836A2 (en) | 2002-02-20 | 2003-02-18 | A fluorescent lamp brightness control process by ballast frequency adjustment |
Country Status (4)
Country | Link |
---|---|
US (1) | US6667585B2 (en) |
EP (1) | EP1477047A2 (en) |
TW (1) | TW200304341A (en) |
WO (1) | WO2003070836A2 (en) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10210805B4 (en) * | 2002-03-12 | 2004-05-27 | B & S Elektronische Geräte GmbH | Ballast for a discharge lamp |
KR100857848B1 (en) * | 2002-05-17 | 2008-09-10 | 삼성전자주식회사 | Back light assembly, method for driving the same, and liquid crystal display having the same |
ATE366507T1 (en) * | 2003-05-19 | 2007-07-15 | Koninkl Philips Electronics Nv | BALLAST WITH LIMITED OPEN VOLTAGE |
US7042170B2 (en) * | 2003-05-31 | 2006-05-09 | Lights Of America, Inc. | Digital ballast |
JP4447885B2 (en) * | 2003-10-24 | 2010-04-07 | 昌和 牛嶋 | Inverter circuit for surface light source device |
KR20050050894A (en) * | 2003-11-26 | 2005-06-01 | 엘지.필립스 엘시디 주식회사 | Back-light unit |
TWI289865B (en) * | 2004-03-23 | 2007-11-11 | Dept Of Power Mechanical Engin | The apparatus of cold cathode lamp being continuous adjustable the operating frequency and high voltage |
KR101012800B1 (en) * | 2004-05-13 | 2011-02-08 | 삼성전자주식회사 | Driving device of light source for display device |
US7133298B2 (en) * | 2004-10-25 | 2006-11-07 | Texas Instruments Incorporated | High frequency voltage regulating transformer based converter |
US7327097B2 (en) * | 2005-03-21 | 2008-02-05 | Hannstar Display Corporation | Light module with control of luminance and method for managing the luminance |
DE102005022591A1 (en) * | 2005-05-17 | 2006-11-23 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Electronic ballast for a low-pressure discharge lamp with a micro-controller |
US7362182B2 (en) * | 2005-08-31 | 2008-04-22 | Ge Security, Inc. | Power amplifier |
US8390211B2 (en) * | 2005-10-17 | 2013-03-05 | Abl Ip Holding Llc | Constant lumen output control system |
US8344658B2 (en) * | 2006-01-19 | 2013-01-01 | International Rectifier Corporation | Cold-cathode fluorescent lamp multiple lamp current matching circuit |
US20080165114A1 (en) * | 2007-01-10 | 2008-07-10 | Logah Technology Corp. | Lcd backlight driving device with an isolating transformer |
EP2124510B1 (en) * | 2008-05-16 | 2013-01-02 | Infineon Technologies Austria AG | Method for controlling a phosphorescent light and light pre-switching device |
US8183798B2 (en) * | 2009-10-05 | 2012-05-22 | Hubbell Incorporated | Variable light control system and method using momentary circuit interrupt |
US9547319B2 (en) | 2012-08-28 | 2017-01-17 | Abl Ip Holding Llc | Lighting control device |
US9041312B2 (en) | 2012-08-28 | 2015-05-26 | Abl Ip Holding Llc | Lighting control device |
US20140152250A1 (en) * | 2012-11-30 | 2014-06-05 | General Electric Company | System and method for controlling output power in a contactless power transfer system |
TWI523577B (en) * | 2014-01-14 | 2016-02-21 | 鉅東應用工程股份有限公司 | Light emitting device |
EP3292080B1 (en) | 2015-05-04 | 2021-02-17 | Evoqua Water Technologies LLC | Method and system for providing ultrapure water with flexible lamp configuration |
WO2018058298A1 (en) * | 2016-09-27 | 2018-04-05 | 绿仕科技控股有限公司 | Dimming switch system and method |
Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3491242A (en) * | 1967-03-27 | 1970-01-20 | Fairchild Hiller Corp | Solar flare detection apparatus |
US4277728A (en) * | 1978-05-08 | 1981-07-07 | Stevens Luminoptics | Power supply for a high intensity discharge or fluorescent lamp |
US4415839A (en) * | 1981-11-23 | 1983-11-15 | Lesea Ronald A | Electronic ballast for gaseous discharge lamps |
WO1989006894A1 (en) * | 1988-01-19 | 1989-07-27 | Etta Industries, Inc. | Fluorescent dimming ballast utilizing a resonant sine wave power converter |
US4874989A (en) * | 1986-12-11 | 1989-10-17 | Nilssen Ole K | Electronic ballast unit with integral light sensor and circuit |
US5047691A (en) * | 1989-11-29 | 1991-09-10 | Gte Products Corporation | High-pass t-networks with integral transformer for gaseous discharge lamps |
US5510681A (en) * | 1978-03-20 | 1996-04-23 | Nilssen; Ole K. | Operating circuit for gas discharge lamps |
US5544214A (en) * | 1993-02-02 | 1996-08-06 | U.S. Philips Corporation | Video system with automatic gain control |
WO1997022232A1 (en) * | 1995-12-08 | 1997-06-19 | Philips Electronics N.V. | Ballast system |
US5747942A (en) * | 1996-07-10 | 1998-05-05 | Enersol Systems, Inc. | Inverter for an electronic ballast having independent start-up and operational output voltages |
US6094016A (en) * | 1997-03-04 | 2000-07-25 | Tridonic Bauelemente Gmbh | Electronic ballast |
US6188177B1 (en) * | 1998-05-20 | 2001-02-13 | Power Circuit Innovations, Inc. | Light sensing dimming control system for gas discharge lamps |
US6232727B1 (en) * | 1998-10-07 | 2001-05-15 | Micro Linear Corporation | Controlling gas discharge lamp intensity with power regulation and end of life protection |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4734650A (en) * | 1985-09-26 | 1988-03-29 | General Electric Company | Adjusting feedback gain in a fluorescent lamp dimming control |
TW349278B (en) * | 1996-08-29 | 1999-01-01 | Nihon Cement | Control circuit and method for piezoelectric transformer |
US5933340A (en) * | 1997-12-02 | 1999-08-03 | Power Circuit Innovations, Inc. | Frequency controller with loosely coupled transformer having a shunt with a gap and method therefor |
US6072282A (en) * | 1997-12-02 | 2000-06-06 | Power Circuit Innovations, Inc. | Frequency controlled quick and soft start gas discharge lamp ballast and method therefor |
US6150775A (en) * | 1999-11-12 | 2000-11-21 | Kau; Steven | Contact actuated lamp |
-
2002
- 2002-02-20 US US10/079,182 patent/US6667585B2/en not_active Expired - Fee Related
-
2003
- 2003-02-18 WO PCT/US2003/004775 patent/WO2003070836A2/en active Application Filing
- 2003-02-18 EP EP03709144A patent/EP1477047A2/en not_active Withdrawn
- 2003-02-18 TW TW092103270A patent/TW200304341A/en unknown
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3491242A (en) * | 1967-03-27 | 1970-01-20 | Fairchild Hiller Corp | Solar flare detection apparatus |
US5510681A (en) * | 1978-03-20 | 1996-04-23 | Nilssen; Ole K. | Operating circuit for gas discharge lamps |
US4277728A (en) * | 1978-05-08 | 1981-07-07 | Stevens Luminoptics | Power supply for a high intensity discharge or fluorescent lamp |
US4415839A (en) * | 1981-11-23 | 1983-11-15 | Lesea Ronald A | Electronic ballast for gaseous discharge lamps |
US4874989A (en) * | 1986-12-11 | 1989-10-17 | Nilssen Ole K | Electronic ballast unit with integral light sensor and circuit |
WO1989006894A1 (en) * | 1988-01-19 | 1989-07-27 | Etta Industries, Inc. | Fluorescent dimming ballast utilizing a resonant sine wave power converter |
US5047691A (en) * | 1989-11-29 | 1991-09-10 | Gte Products Corporation | High-pass t-networks with integral transformer for gaseous discharge lamps |
US5544214A (en) * | 1993-02-02 | 1996-08-06 | U.S. Philips Corporation | Video system with automatic gain control |
WO1997022232A1 (en) * | 1995-12-08 | 1997-06-19 | Philips Electronics N.V. | Ballast system |
US5747942A (en) * | 1996-07-10 | 1998-05-05 | Enersol Systems, Inc. | Inverter for an electronic ballast having independent start-up and operational output voltages |
US6094016A (en) * | 1997-03-04 | 2000-07-25 | Tridonic Bauelemente Gmbh | Electronic ballast |
US6188177B1 (en) * | 1998-05-20 | 2001-02-13 | Power Circuit Innovations, Inc. | Light sensing dimming control system for gas discharge lamps |
US6232727B1 (en) * | 1998-10-07 | 2001-05-15 | Micro Linear Corporation | Controlling gas discharge lamp intensity with power regulation and end of life protection |
Also Published As
Publication number | Publication date |
---|---|
EP1477047A2 (en) | 2004-11-17 |
WO2003070836A2 (en) | 2003-08-28 |
TW200304341A (en) | 2003-09-16 |
US20030155873A1 (en) | 2003-08-21 |
US6667585B2 (en) | 2003-12-23 |
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